During my investigation of #833, I thought it odd that, once a Policy has been revoked, we expect that Bob will encounter NotEnoughUrsulas:

Now... maybe, at a high-level, this is true - we expect that Bob will treat any 404 as insufficient, and ultimately conclude that there are Not Enough Ursulas to complete the retrieval.

The problem is that this is not at all why this is happening. Instead, it "works" for a terrible reason - and it's the same reason that #833 is broken in the first place: that Bob doesn't generate new work orders once he has retrieved. So if he generates zero work orders, he reaches out to zero Ursulas. And of course zero is not enough!